Look, on the Sidewalk -- It's John Mayer! 12/6/2007 1:16 PM PST BY TMZ STAFF He's been romantically linked to Jennifer Love Hewitt, Jessica Simpson, Cameron Diaz and Minka Kelly -- so it's safe to say John Mayer has earned the right to wear a Superman t-shirt. Let's hope he's not faster than a speeding bullet. Related Articles Mayer to Photog: Show Some Class! John Mayer Is An "Insufferable Douchebag"